Comic-Con is just getting underway in San Diego—with Bill Murray and Hellboy kicking off the wave of nerdery earlier today—and we doubt there’s any better way to continue these festivities than with everybody’s favorite 900-something-year-old alien and his plucky, young companion. That’s right, today was Doctor Who day at Comic-Con, and though the BBC didn’t have much to say about the future of what is probably its most popular series that isn’t a dry comedy about humorous misunderstandings, it did show off a new trailer and reveal that the new season (or “series,” to our English friends) will premiere on September 19.

The trailer itself features the usual sort of things you’d expect from a Doctor Who trailer, including mysterious voiceovers, Daleks, and some weird monsters, but that’s not to say that there aren’t some surprises. For one, Michelle Gomez’s Missy shows up and she seems surprisingly friendly with Jenna Coleman’s Clara. Also, the Doctor plays an electric guitar for a second, which is pretty cool. The big hook, though, is a quick appearance from Game Of Thrones’ Maisie Williams that is obviously designed to get Doctor Who fans talking about who she could be playing. All executive producer Steven Moffat would say is that “it’s going to be surprising, what she gets up to.” We’ll have to wait until (at least) September to find out.